- #1

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## Homework Statement

A 50-kg mass is dropped from a 20-m height onto a very long, initially uncompressed spring of force constant k = 100 N/m

## Homework Equations

Ueo=Ugf+Uef

F=k(Lenght Final-length initial)

## The Attempt at a Solution

I tried using Ueo=Ugf+Uef, and i couldnt figure out what to use for some of the values.

so far i got 1/2*4.9^2=Ugf+Uef, i dont know what to put for the final heights.